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MRI confirms mild cognitive impairments prodromal for Alzheimer's, vascular and Parkinson-Lewy body dementias.

Abstract：

OBJECTIVES:MRI assessments were correlated with serial Combined Mini-Mental Cognitive Capacity Screening Examinations (CMC). Vascular-MCI (VMCI), Neurodegenerative MCI (NMCI) and Parkinson-Lewy body MCI (PLB-MCI) were compared during conversions to dementia. Mild cognitive impairments (MCI) are identifiable prodromes for all dementia subtypes. MRI abnormalities are characterized among MCI subjects prodromal for dementia of Alzheimer's disease (DAT), vascular dementia (VaD) and Parkinson-Lewy body dementia (PLBD). METHODS:Aging volunteers (n=166) were recruited from ongoing longitudinal studies of aging, stroke, cerebrovascular disease and dementia. Cognitively normal (CN, n=52), MCIs of neurodegenerative (N-MCI, n=30), vascular (V-MCI, n=35) and Parkinson-Lewy Body (PLB-MCI, n=8) subtypes, plus converted DAT (n=19), VaD (n=17) and PLBD (n=5) were all diagnosed according to established protocol recommendations. Cerebral MRI abnormalities were likewise intercorrelated utilizing quantitative volumetric measurements. RESULTS:V-MCI and converted VaD showed extensive leukoaraiosis with more lacunar infarcts than subjects with N-MCI or PLB-MCI. N-MCI, prodromal for DAT, showed medial temporal atrophy, greater enlargement of temporal horns, and fewer vascular lesions. PLB-MCI, prodromal for PLBD, displayed third ventricular enlargement greater than N-MCI and V-MCI, with similar but less severe atrophy of medial temporal lobe than N-MCI and fewer vascular lesions than V-MCI. Cognitive Impairments due to PLB with vascular features (V-PLB-CI) showed more lacunar and microvascular lesions involving both white matter and basal ganglia with greater frontal horn enlargement. CONCLUSIONS:This study confirms different MCI subtypes prior to conversion to different dementias listed, recognizable by specific MRI abnormalities.

journal_name

J Neurol Sci

journal_title

Journal of the neurological sciences

authors

Meyer JS,Huang J,Chowdhury MH

doi

10.1016/j.jns.2007.01.016

subject

Has Abstract

pub_date

2007-06-15 00:00:00

pages

97-104

issue

1-2

eissn

0022-510X

issn

1878-5883

pii

S0022-510X(07)00039-1

journal_volume

257

pub_type

杂志文章

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